Watts PWR8024 - Manual (Page 2)

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I. Introduction
The separation of dissolved solids and water using RO membranes
is a pressure driven temperature dependent process. The membrane
material is designed to be as permeable to water as possible while
maintaining the ability to reject dissolved solids.
The main system design parameters require the following:
• Internal flows across the membrane surface must be high enough
to prevent settling of fine suspended solids on the membrane
surface.
• The concentration of each dissolved ionic species must not exceed
the limits of solubility anywhere in the system.
• Pre-treatment must be sufficient to eliminate chemicals that would
attack the membrane materials.
A. Specifications
RO Membrane
Feed Water Product Water
Reject Water
B. RO Overview
Reverse osmosis systems utilize semipermeable membrane ele-
ments to separate the feed water into two streams. The pressurized
feed water is separated into purified (product) water and concentrate
(reject) water. The impurities contained in the feed water are carried
to drain by the reject water.
Model NuMber PWR80243085 PWR80243125 PWR80243165 PWR80243205
Maximum Productivity (gallons per minute) 40 60 80 100
Quality (typical membrane percent rejection) 99%
Recovery (adjustable) 65% - 75%
Membrane Size 8" x 40"
Membrane Array (four elements per vessel) 1:1 2:1 2:2 3:2
Prefilter (system ships with five micron cartridges) 7 round x 40" 7 round x 40"
Feed Water Connection 2" Flange 2.5" Flange 3" Flange
Product Water Connection 2" Flange 2.5" Flange
Reject Water Connection 1.5" Flange
Feed Water Required (GPM at 65% recovery) 62 93 123 154
Minimum Feed Water Pressure 20 PSIG 20 PSIG 20 PSIG 20 PSIG
Drain Required (maximum) 62 93 123 154
460 VAC, 3-phase, 60Hz (other voltages available) 25 amps 30 amps 35 amps 40 amps
Motor Horse Power (TEFC Motor) 15 20 25 30
Dimensions L x W x H (approximate) 186" x 26" x 72"
Shipping Weight (estimated pounds) 2500 2800 3200 3500
Notes:
• Maximum production based on a feed water of 77° F, SDI < 3,
1000 ppm TDS, and pH 7.6.
Individual membrane productivity may vary (± 15%). May be
operated on other feed waters with reduced capacity.
• Percent Rejection is based on membrane manufactures specifi-
cations; overall system percent rejection may be less.